CAAP AMT Knowledge Exam flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

PCAR Part 145

Philippine regulation covering approved maintenance organizations; requires an exposition, quality system, qualified personnel, and CAAP certification before performing maintenance on aircraft.

Airworthiness Certificate validity

Remains valid when the aircraft conforms to its approved type design and is in a condition for safe operation; maintenance and inspections must be recorded.

Airworthiness Directive compliance

ADs issued by the state of design are mandatory; the operator must track applicability, accomplish the required action within the stated time, and record compliance.

Major alteration approval

Requires approved data such as an STC, repair scheme, or design approval, and documentation submitted before the aircraft is returned to service.

Moment calculation

Moment equals weight multiplied by arm measured from the datum; total moment divided by total weight gives the center of gravity position.

Weight shift formula

Weight moved divided by total weight equals change in CG divided by distance moved; used to compute the effect of relocating equipment or ballast.

Maximum zero-fuel weight

The maximum weight of the aircraft excluding usable fuel; it limits structural loading of the fuselage and wing attachments independent of fuel quantity.

CG as percent MAC

Center of gravity expressed as a percentage of mean aerodynamic chord; conversion uses the leading edge station and chord length in the same units.

2024-T3 aluminum

Copper-magnesium alloy with high strength and good fatigue resistance; commonly used for aircraft skins and structures requiring formability and damage tolerance.

Alclad protection

A pure aluminum surface layer bonded to a stronger core alloy; it provides corrosion protection, and scratches through the cladding require treatment.

Safety wire direction

Wire is installed so tension pulls the fastener in the tightening direction; use double-twist, about 6-8 twists per inch, with 3-6 end turns.

Rivet shop head

Formed head should be about 1.5 times the shank diameter in width and about 0.5 times in height; incorrect heads indicate improper setting.

Torque wrench extension

Extensions in line with the handle do not change applied torque; crowfoot or offset extensions change the effective lever arm and require recalculation.

Lockout/tagout

Procedure to disconnect and tag energy sources before maintenance; verify de-energization to prevent unexpected startup or release of stored energy.

Fuel grounding and bonding

Aircraft and fueling equipment are electrically bonded and grounded to prevent static discharge; ignition sources are eliminated during fueling and defueling.

FOD prevention

Tool inventory and inspection of intakes, bays, and closed panels before flight; foreign objects can damage engines and jam flight controls.

Maintenance record entry

Must identify the work performed, the approved data used, the date, and the certifying person's signature and license number; unrecorded work is incomplete.

Semimonocoque structure

Construction using skin, stringers, and frames; skin carries shear and tension while stringers and frames stabilize it against buckling.

Stress corrosion cracking

Cracking in high-strength aluminum under sustained tensile stress in a corrosive environment; inspection focuses on fittings, holes, and highly loaded areas.

Landing gear squat switch

Switch sensing weight on the gear; it prevents retraction on the ground and enables gear warning and system logic in flight.

Cabin pressurization control

Outflow valves regulate cabin altitude and differential pressure; the controller schedules pressure within structural limits during climb and descent.

Brayton cycle

Turbine engine cycle of compression, constant-pressure combustion, expansion, and exhaust; efficiency increases with pressure ratio and turbine inlet temperature.

Detonation versus preignition

Detonation is uncontrolled rapid combustion causing high pressure and temperature; preignition is ignition before spark, often from a hot spot.

Exhaust gas temperature

EGT indicates combustion and mixture distribution in reciprocating engines and turbine temperature limits; excessive EGT can damage engine components.

Propeller feathering

Blades rotate to align with airflow, reducing drag after engine failure; the governor and feathering system must be checked for proper operation.

Aircraft bonding

Low-resistance electrical connection between structural parts and equipment; it provides a return path and prevents static buildup and arcing.

Circuit breaker protection

Protects wiring from overcurrent; never substitute a higher-rated breaker, and reset only after the cause of the trip is identified.

Pitot-static leak check

Verifies integrity of static and pitot lines; leaks cause erroneous airspeed, altitude, and vertical speed indications and must be corrected before flight.

Dirty Dozen

Common human factors in maintenance including fatigue, complacency, distraction, pressure, and lack of resources; each contributes to maintenance error.

SHEL model

Framework of Software, Hardware, Environment, and Liveware; mismatches at interfaces between these components create error opportunities.

Just culture

Approach distinguishing human error from reckless behavior; reporting systems encourage disclosure and learning while maintaining accountability for intentional violations.

Task interruption management

Record the step reached and complete the task before moving on; interruptions and distractions are common causes of skipped steps in maintenance.